Otocinclus Catfish

Otocinclus Catfish (Otocinclus sp.)
The Otocinclus Catfish, often called “Otos” or “Dwarf Suckers,” is a small, peaceful freshwater catfish native to rivers across South America. Known for its slender body and algae-eating habits, this species is excellent for keeping tanks clean while adding gentle activity to the lower levels of community aquariums.

Quick Facts:

• Origin: South America

• Family: Loricariidae

• Adult Size: Up to 5 cm

• Lifespan: 3–5 years

• Temperament: Peaceful, social, schooling

• School Size: Minimum group of 6+

• Tank Level: Bottom-dweller

• Diet: Herbivore/Omnivore – algae wafers, blanched vegetables, biofilm, occasional sinking pellets

• Water Temperature: 22–26 °C

• pH Range: 6.5–7.5

• Water Hardness: Soft to moderately hard

• Tank Setup: Smooth substrate, live plants, gentle water flow, hiding spots

• Compatibility: Excellent for peaceful community aquariums

• Care Level: Beginner